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Chemical Sampling Information (CSI)
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General Description

Synonyms: 2,4-Dichlorophenoxyacetic Acid; Hedonal; Trinoxol

OSHA IMIS Code Number: 0846

Chemical Abstracts Service (CAS) Registry Number: 94-75-7

NIOSH Registry of Toxic Effects of Chemical Substances (RTECS) Identification Number: AG6825000; 2043

Department of Transportation Regulation Number (49 CFR 172.101) and Guide: NA2765 Poison

Chemical Description and Physical Properties:

colorless, odorless solid
molecular weight: 221
vapor pressure: approx 0 mm
boiling point: Decomposes
melting point: 284°F

Incompatibilities: Strong oxidizers

Exposure Limits

OSHA Permissible Exposure Limit (PEL):

General Industry: 10.0 mg/m3

Construction Industry: 10 mg/m3 TWA

American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV): 10 mg/m3 TWA; Appendix A4 (Not Classifiable as a Human Carcinogen)

National Institute for Occupational Safety and Health (NIOSH) Recommended Exposure Limit (REL): 10 mg/m3 TWA

Health Factors

Carcinogenic Classification:

International Agency for Research on Cancer (IARC): Group 2B, possibly carcinogenic to humans [1 MB PDF, 454 pages] (Chlorophenoxy Herbicides)

Potential Symptoms: Weakness, stupor; hyporeflexia, muscle twitching; convulsions; dermatitis. In animals: liver, kidney damage

Health Effects: Mutagen (HE3); CNS effects (HE7)

Affected Organs: Skin, CNS

Additional Information:

  • Occupational Health Guidelines for Chemical Hazards. US Department of Health and Human Services (DHHS), National Institute for Occupational Safety and Health (NIOSH) Publication No. 81-123, (1981, January). Provides a table of contents of guidelines for many hazardous chemicals. The files provide technical chemical information, including chemical and physical properties, health effects, exposure limits, and recommendations for medical monitoring, personal protective equipment (PPE), and control procedures.

Date Last Revised: 12/01/1998

Monitoring Methods used by OSHA

Primary Laboratory Sampling/Analytical Method (SLC1):

  • sampling media: Glass Fiber Filter (Gelman Type AE or equivalent)
    maximum volume: 200 Liters REC F: 3.0 L/min
    current analytical method: High Performance Liquid Chromatography; HPLC/UL50
    method reference: 1,2 OSHA modified NIOSH 5001 [23 KB PDF, 4 pages]
    sampling and analytical error: 0.08
    method classification: Fully Validated

Conditions: Methanol extraction, u Bondapak, C18 column; 55% Methanol 44% water 1% acetic acid; 1.3 mL/min; UV det: 254,280; Retention time, 14 min.

Bulk Method:

  • Limit the amount of bulk submitted to one gram or one mL.

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